Decimal-spacing mechanism for type-writing machines.



C. F. LAGANKE & J. A. SMITH. DECIMAL SPAUING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED AUG. 23, 1904.

Patented May 25, 1909.

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a "MM Yuma) O. P. LAGANKE & J. A. SMITH.

DEGIMAL SPACING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION TILED AUG. 23, 1904.

Patented May 25, 1909.

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922,601 Patented May 25, 1909.

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(-HA RLES 1*. LAGANKE AND JOHN A. SMITH, OF CLEVELAND, OHIO, ASS IGNORSTO ELLIOTT- FISHER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

DECIMAL-SPACING- MECHANISM FOR TYPE-WRITING MACHINES.

Specification of Letters Patent.

Patented May 25, 1909.

Application filed August 23, 1904. Serial No. 221,857.

To all whom it may concern:

Be it known that we, CHARLES F. LA- GANKE and JOHN A. SMITH, citizens of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Decimal-Spacing Mechanism for Type-Writing Machines, of which the following is a specification.

This invention relates to typewriting machines, but more particularly to spacing mechanism designed to automatically exaggerate the letter space movement of the carriage at the proper point to provide for the decimal, comma or other space.

The object of the invention is to provide simple and effective means whereby the carriage will be prevented from stopping with the printing point of the machine opposite a decimal, comma or other space, thus rendering unnecessary the depression of the space key by the operator as, for instance, after printing a character in the units order and before printing a character in the tenths order of the column.

A further object is to organize the mechanism for adjustment relative to the platen so that the exaggerated or decimal space movement of the carriage may be effected to accommodate a decimal or other s ace located at any desired point on the wor sheet, or so that the mechanism may be rendered operative or non-operative at a given point in the carriage travel.

To the accomplishment of these objects and others subordinate thereto, the preferred embodiment of the invention resides in that construction and arrangement of parts to be hereinafter described, illustrated in the accompanying drawings and succinctly defined in the appended claims.

In said drawingsFigure 1 is a vertical sectional view of a combined typewriting and calculating machine of the Elliott- Fisher type equipped with our invention and having'certain of the parts broken away or omitted. Fig. is a transverse sectional view of the typewriter carriage showing the carriage support, the escapement which controls the letter space movements of the car- Iiage, and certain elements of the supplemental or decimal spacing mechanism. Fig. 3 is a detail view showing the positions as- I sumed by the parts of the spacing mechanism during the decimal s ace movement of the carriage. Figs. 4 an 5 are detail views of the dogs, and Fig. 6 is a perspective view illustrating the entire spacing mechanism and designed more articularly to show the line of connection between a key and the esca )ement, and the arrangement whereby the latter is automatically operated to permit the exaggerated or decimal space movement of the carriage.

Like numerals indicate the same parts in all the views.

Before proceeding with the descri tion of the structure, it may be stated that t e decimal spacing mechanism upon which this application is predicated has been designed with special reference to the e ui ment of a combined typewriting and ca cu ating machine involving in its organization a Fisher typewriter, exemplified, for instance, in Patent No. 573,868 to R. J. Fisher, and characterized by a fiat platen and a traveling carriage movable bothlongitudinally and transversely of the laten and carrying printing mechanism inc uding both letter and numeral types. We shall, therefore, describe the invention in connection with the combination machine although the invention, so far as the present application is concerned, is to be viewed as a part of the typewriter equipment, since its utility as an aid to ordinary tabulation is apparent, apart from its.

wr iter.The Fisher typewriter embodies a,

main frame 1 mounted to travel longitudinally of a flat platen 1, the writing surface of which is indicated in Fig. 1. The frame 1 is provided with front and rear carriage guides, only one of which, towit, the rear guide 2, is shown. These guides support a carriage 3 movable transversely of the platen and supporting the rinting mechanism. The upper portion of t e carriage 3 is in the form of a casing 4 above which are exposed the numeral and letter keys 5 and 6 having stems 7 connected at their lower ends to the key levers 8 fulcrumed within the carriage casing and connected by draw wires 9 with downwardly swinging type bars 10 carried by a type ring 11 pendent from the carriage casing, as is well understood in the art (see Fig. 1). The carriage 3 is moved to the right by carriage propelling mechanism including carriage tapes 12 connected at their inner ends to the carriage and at-their ou/ter ends to spring drums (not shown) mounted on the machine frame.

The step-by-ste advance of the carriage in the direction of le by carriage feeding mechanism including in its organization racks 13 associated with the carriage guides and meshing with carriage pinions 14 fixed to a feed spindle 15 extending transversely of the carriage (see Fig. 1) and carrying the escapemcnt wheel 16, (see Fig. 6). Only the rear rack guide and pinion are shown. in the form of a ratchet andconstitutes the rack element of the escapemcnt, by the operation of'which the step-by-step advance of the carriage under the impulse of the carriage propelling mechanism -is permitted.

vIn addition to the Wheel 16 the escapemcnt of the carriage feeding mechanism includes dogs 17 and 18 disposed for alternate engagement with the teeth of the wheel. 16. Normally, as shown in Fig. 2, the dog 17 engages the ratchet wheel and holds the same, thus preventing the forward movement of the carriage. When, however, the dogs are swung, the dog 17 moves out of engagement with the wheel, but before the disengagement is effected, the normally disengaged dog18 moves into engagement. Such movement of the parts is effected by the depres-' sion of one of the keys. When the key is released and thus permittedto rise, the movement of the dogs is reversed, and while the dog 18is moving out of engagement with the wheel and before the dog 17 moves back into engagement therewith, the wheel is ermitted to rotate an almost inapprecia le distance so that the dog 17 instead of moving back into engagement with the flat face of the tooth before engaged by it, will engage the next succeeding tooth when the dog 18 has moved back sufiiciently to release the wheel and thus permit the partial rotation thereof and the advance of the carriage the distance of one letter space.

The operating mechanism. between the keys and the escapemcnt includes an arm 19 extending from the dog 18 and connectedby a link 20 to an arm 21 projecting from a rock shaft 22 extending longitudinally of the carriage adjacentto its rear wall, (see Figs. 2 and6). This rock shaft 22 is rocked or vibrated by key yokes 23 mounted to swing within the casing and arranged to be engaged and swung by a pin 24 (one of which is carried by each key stem) just as the key reaches the limit of its downward movement. It will thus be. apparent that the complete depression of a key will effect the swinging of a yoke 23 to rock the shaft 22 and thus shift the escapemcnt dogs simultaneously in oppotter spacing is controlled The escapemcnt wheel 16 is digits in the units and tenths columns.

site directions, the release of the key serving to permit reverse movement of the dogs for the purpose ofeifecting the feed of the carriage in the manner before stated. To permit the release of the carriage from the control of the escapemcnt, carriage release mechanism is provided. This mechanism in cludes a release lever 25-arranged (when operated by the carriage release key not shown) to swing both dogs out of engagement with the wheel 16, it being understood that while the dogs normally swing in unison but in opposite directions, they are mounted in a mannet to permit their simultaneous disengagement from the escapemcnt wheel under certain conditions. described is ordinary, being a part of the equipment of the Fisher typewriter as shown and described in the Fisher patent before.

.not depend upon such association.

In the rearof the machine frame 1 a guide bar 26 is supported in arallelism therewith and on this ar is shifta ly supported a computing device 27 designed to be located at any desired point for use with reference to a column of numbers to be printed on a work sheet by the typewriting mechanism. This The mechanism thus farv computing device constitutes no part of our present invention and it may, therefore, be dismissed with the statement that its digit carriers or number wheels are operatively related to the numeral keys of the typewriter, when the latter is disposed to printin the column with reference to which the computing device is to be utilized.

The automatic decimal spacing means..ln ordinary tabulating work it is not customary to print the decimal, it being considered sufiicient to provide a decimal space between the In the construction of the computing device provision is made for this space by making the tenths wheel of double width, but to provide for the advance of the machine beyond the decimal space, it has heretofore been nec tooth of the Wheel 16 succeedingthe one' momentary, however, so that as soon as the.

release of a key which has been depressed to print a numeral in the units order. In describing the general characteristics of the Fisher typewriting machine, attention has been directed to the operation of the carriage escapement, and it will be remembered that ordinarily the normally engaged dog 17, after having been moved out of engagement with the ratchet wheel 16 by the depression of a key, engages the next succeeding tooth of the wheel when the key is released. In order to effect the double feed, which is necessary to skip the decimal space and to advance the machine directly from the units to the tenths order, we provide means which, when the holding dog 17 is moved out of engagement with the wheel 16, retards the return movement of the dog to its engaging position, for that instant of time necessary to permit the ends of two teeth of the wheel, instead of one, to pass the nose of the dog before the latter again engages the wheel.

Connected to, or formed as an integral part of the holding dog 17 of the carriage escapement, is an arm 28, the end of which is disposed for engagement by an arm 29 extending laterally from a rock-shaft 30 provided with a cylindrical bearing sleeve 31 piercing the back wall of the carriage casing 3 and retained thereby. (See Fig. 1.) At the extremity of the shaft 30 in rear of the carriage is fixed a trip arm 32 having at its enda pointed beak or projection 33 which, when the printing point of the writing mechanism arrives opposite the decimal space on the work sheet, will contact with a relatively stationary trip 34 in the form of a pointed tooth depending from the under sideof the computing device 27. (See Figs. 1, 3 and 6.) Just as the projection of thetrip arm 32 engages the trip 34, the holding dog 17 of the escapement will be in position to engage the from which it has been disengaged by the depression of a key, but as the trip arm is slightly depressed in passing under the trip, the shaft 30 will be rocked to cause the arm 29 thereon to slightly depress the arm 28 thus keeping the nose of the holding dog 17 out of engagement with the wheel until the points of two teeth instead of one shall have passed. This retardation of the holding dog is only automatic decimal spacing has been insured, the projection 33 will move past the trip 34, thus permitting the holding dog 17 to complete its movement and thereby arrest the machine with its printing point opposite the tenths order of the column.

It will now be seen that while the escapement is operated from the keys in the usual manner to effect the letter space movements of the carriage, this movement, succeeding the printing of a character in the units order of a. column, will be automatically exaggerated to accommodate the decimal space, by reason of the retardation of the holding dog 17 which permits the wheel 16 to move the distance of two steps or increments before it is arrested with the printing point of the carriage opposite the tenths order of the column since it is impossible to print in the decimal space by oversight. Attention is also directed to the fact that, since the trip 34 is adjustable transversely of the platen with the computing device, it is possible to adjust the decimal spacing mechanism for use with reference to columns variously located on the Work sheet, or to determine whether such mechanism shall or shall not operate. Attention is also directed to the fact that while the space skipping mechanism described has been designed with special reference to the skipping of the decimal space, it is clearly available for automatically skipping the machine over any other space, as for instance a comma space. While the invention has been described in connection with a combination typewriter and adder in which it is particularly desirable to skip over the decimal point, it is equally desirable in some classes of typewriting to facilitate speed by providing for automatically skipping over a comma or other space when it is not considered necessary to print the comma or other character, the present invention being designed to effect any exaggeration of normal spacing which may be desired to provide for a decimal, comma, or other space.

While the illustrated organization of the spacing mechanism constituting our present invention is thought at this time to be preferable, we wish to be distinctly understood as reserving the right to effect such modifications or variations thereof as may come fairly within the scope of the protection prayed.

\Nhat we claim 1s 1. In a typewriting machine, the combination with. a movable carriage, printin r mechanism and an escapement controlling the movement of the carriage and operated by the printing mechanism, of means operative to cause an exaggerated spacing movement of the carriage and brought into action by the movement of the carriage incidental to the o eration of the printing'mechanism,

2. En a typewriting machine, the combination with a movable carriage, printin mechanism, and an escapement controlling the spacing movement 0 the carriage and operated 'by the printing mechanism, of means operative .to cause exaggerated spacing movement of the carriage and brought into action automatically by the movement of the carriage incidental to the operation of the printing mechanism, said means being variable to determine whether the same shall or shall not operate.

3. In a typewriting machine, the combin ation with a movable carriage, printing mechanism and an escapement controlling the step-by-step advance of the carriage and operated by the printing mechanism, of means brought into operation automatically by the movement of the carriage as the printing mechanism is operated, to exa gerate the normal spacing movement of tie carriage and cause the same to automatically skip over a decimal or other space, said means being adjustable to determine the particular point in thetravel of the carriage; at which the skip spacing shall occur.

' 4. In a typewriting machine, the combination with a carriage, of an escapement rack having a series of uniformly spaced teeth, escapement dog mechanism cooperating with the rack to control the movement of the carriage, and mechanism, acting automatically at a given point in the movement of the carriage, and while the dog mechanism is in eooperative relation with the uniformly spaced rack teeth, to cause the escapement to permit an abnormal movement of the carriage.

5. In a typewriting machine, the combination with a carriage, of an escapement rack having a series of uniformly spaced teeth, escapement dog mechanism intermittently engaging said teeth to arrest the movement of the carriage, and mechanism, automatically brought into cooperative relation with the escapement by the movement of the carriage, and operating to cause an abnormal movement of the carriage to be permitted before its arrest is effected by the engagement of the dog mechanism with-a tooth of the uniformly spaced series of teeth.

6. In a typewritlng machine, the combina-' tion with a carriage, of an escape'ment rack having a series of uniformly spaced teeth, escapement dog mechanism intermittently engaging the rack to arrest the movement of the carriage, and mechanism for automatically causing an increase of the normal period of disengagement of the escapement elements while the dog mechanism is cooperatively.

related to the uniformly spaced teeth of the rack. v 4 y 7. In a typewriting -machine,.the combina tion with a carriage and printing mechanism,

of an escapement rack, escapement do;

mechanism cooperating therewith to contro the movement of the carriage and-operated by the printing mechanism, and means adjustable independently of the escapement rack and brought into action by the movement of the carriage, incidental to the operation of the printing mechanism, to cause an abnormal operation of the escapement.

8. In a typewriting machine, the combinaescapement and thus permit an abnormal movement. of the carriage, when the latter reaches a point predetermined by the adj ustment of said means.

9. In. a typewriting machine, the combination with a carriage, of an escapement rack, escapement dog mechanism cooperating with the rack to control the movement of the carriage, escapement o crating keys, and means, independent of t e escapement rack and keys, for automatically causing an exaggerated operation of the escapement and a consequent abnormal movement of the carriage, when the latter reaches a given point.

10. In a typewriting machine, the combination with a platen and carriage, of an escapement rack, escapement dog mechanism cooperating with the rack to control the movement of the carriage, and a decimal spacing device adjustable relative to the platen and independently of the rack, to dispose said device with reference to any column on the work sheet, said decimal spacing device being arranged to cooperate with the escapement dog mechanism to automatically space the carriage over the decimal point.

11. In a typewritingmachine, the combinationwith a frame and carriage, of an escapement rack, escapement dog mechanism cooperating with the rack to control the movement of the carriage, and automatic s acing means including elements mounted.

dog mechanism cooperating on the frame'and carriage respectively and cooperating to exaggerate the normal spacing movement of the carriage under the control of the escapement.

12. In a typewriting machine, the combination with a frame and carriage, of an esativerelation with one of the dogs to prevent said dog from moving into engagement with the rack member until the latter has 'ad-' vanced more than the distance of a single normal step. 14. In a typewriting machine, thecomb nation with a movable carriage and carriage propelling mechanism, of an escapement mechanism controlling the step-by-step advance of the carriage, said escapement mechanism including a rack member and a pair of dogs, a key for moving one dog out of en'- gagement with the rack member and the other dog into engagement with said member, means operative upon the release of the key for reversing the movement of the dogs, and means operative after the release of the key to temporarily-retard the return movement gt a dog into engagement with the rack memerv 15, The combination with a platen and printing mechanism, relatively movable one with respect to the other in the direction of letter spacing, of an escapement controlling said relative movement and operated by the printing mechanism, and a member brought into coaction with the escapement by the relative movement of the platen and printing mechanism to cause an exaggeration of the normal operation of the escapement by the printing mechanism and thereby effect an exaggeration of the relative movement of the )laten and printing mechanism caused by t e operation of the latter.

16. The combination with a platen and printing mechanism, relatively movable stepy-step in the direction of letter spacing, of an escapement controlling such movement and operated by the printing mech anism, said escapement including elements relatively movable out of and into engagement with each other to permit relative movement of the platen and printing mech anism and to arrest such movement, and a member automatically brought into coopera tive relation with the esca ement by the relative movement of the p aten and printing mechanism, incidental to the operation of the latter, to retard theengagement of the escapement elements and thus permit the exaggeration of the normal relative movement of the platen and printing mechanism.

17. The combination with a platen and printing mechanism, relatively movable, of an escapement controlling such relative movement and operated by the printing mechanism, and means brought into action during and by the relative movement of the platen and printing mechanism incidental to the operation of the latter, and coacting with the escapement to cause an exaggeration of the normal relative movement of the platen and printing mechanism.

18. The combination with a platen and printing mechanism, relatively movable one with res ect to the other, of an escapement o erated by the printing mechanism and inc uding a rack member and a pair of dogs,

and a trip brought into coo erative relation with an escapement dog y the relative movement of the platen and printing mechanism, incidental to the operation of the printing mechanism, and arranged to retard the movement of said dog to its engaging position. 19. In a typewriting machine, the comblnation with a carriage, of an escapement controlling the normal step-by-step advance of said carriage, release mechanism arranged to operate the escapement to permit free movement of the carriage, and mechanism independent of the release mechanism and acting automatically at a given point in the movement of the carriage to exaggerate the extent of the carriage movement by cooperation with the escapement. 20. In a typewriting machine, the combination with a carriage, of an escapement controlling the normal step-by-step advance of said carriage and including a rack having uniformly spaced teeth and dogs cooperating with the rack, carriage release mechanism cooperating with the escapement to permit free movement of the carriage, a device mounted independently of the release mechanism, and means brought into engagement with said device by the advance of the carriage and operating when so engaged to cause an exaggerated operation of the escapement. 21. In a typewriting machine, the combination with a carriage, of an escapement controlling the norrnal step-by-step advance of said carriage and includin a rack and co'- operating dogs, carriage re ease mechanism arranged to operate the escapement to permit free movement of the carriage, and means independent of the release mechanism and brought into action automatically by the 'movement of the carriage and operatmg to cause an exaggerated movement of the carriage under the controlof the escapement.

22. In a typewriting machine, the combnation with a carriage, of an escapement controlling the normal step-by-step advance of said carriage, carriage release mechanism mounted on the carriage, a trip mounted on the frame, and means independent of the release mechanism and cooperating with the trip at a given point in the advance of the carriage to retard the action of the escapement and thus permit an abnormal movement of the carriage.

23. In a typewriting machine, the comb1- nation with a carriage, of an esca ement 1ncluding a rack and dogs adapter to be operated by the typewriter keys to effect uniform spacing throughout the carriage travel, release mechanism cooperating with the escapement to cause the complete release of' the carriage from the escapement mechanism, and means arranged to be brought 1nto action by the movement of the carriage un-' der normal operating conditions to cause ex- .aggerated spacing movement of said carpermit the carriage to move for t e purpose stated.

25. In a typewritin machine, the combination with a movab e carriage, of an escapement controlling the movement of the carriage for normal spacing, said escapement including a normally engaged dog, a normally disengaged dog and a rack member alternately engaged by said dogs, a printing key arranged to operate the escapement dogs to move the normally engaged dog out of engagement with the rack member and to move the normally disengaged dog into engagement with the said member, means operative upon the release of the printing key to advance the carriage, means operative upon the release of said key to withdraw the normally disengaged dog from the escapement member, and thus permit the advance'of the carriage, and to move the normally engaged dog toward the rack member to arrest the carriage, and a trip brought into cooperative relation with the normally engaged dog by the movement ofthe carriage u on the release of the printing key, to retar the movement of said dog toward the rack member and to thus permit an exaggerated movement of the carriage before such movement is arrested by the engagement of the normally engaged dog with the rack member.

26. The combination with a typewriter including two primary elements, to-wit, a frame and a movable carriage, an escapement mounted on one of said elements and including a rack member and a air of dogs cooperating with the rack mem er to con 27. The combination with two primary.

elements, to -wit, a frame and a movable carriage, of an escapement controlling such movement and including a rackmember and a pair of dogs coo crating therewith, said dogs being mounte on one of the :primary elements, a device mounted on the other primary element and adapted to coact with the escapement to cause the normal movement of the carriage to be increased, and printing mechanism operative to actuate the escapement and to cause the same to coact with said device.

28. The combination with a platen and printing mechanism mounted to travel thereover, of an escapement controlling the letter space movements of the printing mechanism, a trip adjustable transversely of the platen to position it with reference to any desired column on a work sheet, and means brought into engagement with said trip by the movement of the printing mechanism and coacting with the escapement for the purpose of effecting an exaggerated feed of the printing mechanism to skip the latter over a decimal or other space.

29. The combination with a platen and a typewriting mechanism mounted to travel thereover, of an escapement movable with said mechanism, a trip arm likewise movable therewith and operatively related to.

the escapement, and a trip mounted independently of the traveling typewriting mechanism and arranged to cooperate .with the trip arm for the purpose of operating the escapement to effect an exaggerated movement or feed of the typewriting mechanism.

30. The combination with a platen, of a machine frame mounted to travel longitudinally thereof, printing mechanism mounted on said frame to travel transversely of the platen, a trip adjustable upon the machine frame to dispose it in proper relation to any desired column, an escapement controlling the letter space movements of the printing mechanism, and a trip arm operativcly related to the escapement and disposed to be presented to the trip by the movement of the printing mechanism to eil'ect abnormal spacing movement of the latter.

31. The combination with an escapement comprising a rack member and a pair of dogs cooperating therewith, of means for operating the escapement,- and decimal spacing means, including an arm operatively related to one of the dogs and means for operating said arm to retard the movement of the dog for the purpose of effecting an exaggerated operation of the escapement.

32. The combination with an escapement including a rack member and cooperating dogs, of a trip arm operatively related to one of the dogs, and a tr1p disposed to engage the trip arm to retard the movement of the dog into engagement with the'rack, for the purpose of eifecting an exaggerated operation of the escapement.

33. The combination with an escapement including a rack member and cooperating dogs, of a rock shaft cooperatively related to one of the dogs, a trip arm extending from one end of the rock shaft, and a. trip disposed to engage said arm to temporarily retard the movement thereof.

34. In a typewriting machine, the combination with a movable carriage, of an escapement mounted on the carriage and including a rack member and cooperating dogs, a rock shaft also mounted on the carriage and operatively related to one of the dogs, a trip arm extending from the rock shaft, and a trip.

mounted independently of the carriage and disposed to engage the trip arm.

The combination with a typewriting machine, of an escapement including a rotary rack member and a pair of coo crating dogs, means for effecting the norma operation of the escapement, an arm extending from one of said dogs, a rock shaft provided at one end with an arm cooperating with the arm first named, a trip arm at the opposite end of said rock shaft, and a trip disposed to engage the trip arm.

36. In a typewriting machine, the combination with a carriage and an escapement controlling the movement thereof, of decimal spacing means including a trip arm operatively related to the escapement and having a pointed tooth, and a trip in the form of a pointed tooth disposed to be engaged by the tooth of the trip arm and to effect a momentary retardation of an escapement element.

37. In a typewriting machine, the combination with a movable carriage, of an escape ment wheel movable therewith, a air of connected dogs also movable with tlie carriage and arranged to alternately engage the escapement wheel at opposite sides thereof to control the movement of the carriage, keys for operating'the dogs, a fixed trip on the frame of the typewriter, and a member extended from one of the dogs and arranged to be moved into engagement with the under side of the trip by the advance of the carriage to retard the movement of the dog to its engaging position and thus permit an exaggerated or abnormal movement of the rotary escapement wheel before the same is arrested by the dog.

38. The combination with a platen and printing mechanism, relatively movable, of means controlling such movement for normal spacing, and automatic decimal s acing mechanism-operative to cause dec1ma spacing of the platen and printing mechanism at a given point in the relative travel of said platen and printing mechanism, sald declmal spacing mechanism being variable to render the same operative or inoperative.

319. The combination with a' movable carriage, of an escapement mechanism operated repeatedly to control the normal step-bystep movement of said carriage, and means automatically brought into action by the' movement of the carriage at a predetermined point in its advance to exaggerate the normal operation of the escapement and thus permit the exaggeration of a step or movement of the carriage, such means being variable to render the same operative or inoperative.

40. The combination with a movable carriage, of an escapement mechanism operative repeatedly to control the normal stepby-step movement of said carriage, auto matic means brought into action by the movement of the carriage at a predetermined point in its advance to exaggerate the normal operation of the escapement and thus permit the exaggeration of a step or movement of the carriage, said means being variable to render the same operative or inoperative, and release mechanism distinct from said automatic means and operative independently thereof to release the movable carriage from the control of the escapement.

41. The combination with a platen and printing mechanism having relative step-by ste movement, of spacing mechanism controlling such movement, and automatic means for exaggerating the movement at a predetermined point in the relative travel of the platen and printing mechanism, said means being variable to render the same operative or inoperative when said point is reached.

42. The combination with a computing device and its actuating mechanism having relative step-by-step movement to change their denominational relation, of automatic means for exaggerating such movement at a redetermined point, said automatic means lieing variable to render the same operative or inoperative when said point is reached.

43. The combination with a platen and printing mechanism normally having relative step by ste movement, of spacing mechanism contro ing such movement, release mechanism for rendering the spacing mechanism inoperative and thus ermitting free relative movement of the p aten and printing mechanism, and automatic means distinct from and independent of the release mechanism for exaggerating the normal relative movement of the platen and printing mechanism when a given point is reached, said means being variable to render the same operative or inoperative.

44. The combination with a computing device and its actuating mechanism normally having relative step-by-step movement to change the denominational relation thereof, of spacing mechanism controlling snch movement, release mechanism for rendering the spacing mechanism inoperative to ermit free relative movement of the computing device and its actuating mechanism, and automatic means distinct from and independent of the release mechanism and operative to as our own, we have hereto affixed our signaexaggerate the normal relative movement of I tures in the presence of two witnesses.

the computing device and itsactuating mech- CHARLES l". LAGANKE. anisin when a given point is reached, said JOHN A. SMITH.

5 means being variable to render the same opi erative or'inoperatlve. l

\Vitnesses:

J. A. ZlEGLER,

In testimony, that we claim the foregoing W. T. MCELROY. 

